1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Keith Whitwell <keith@tungstengraphics.com>
32 * Ian Romanick <idr@us.ibm.com>
35 #include <spu_mfcio.h>
37 #include "pipe/p_util.h"
38 #include "pipe/p_state.h"
39 #include "pipe/p_shader_tokens.h"
40 #include "spu_vertex_shader.h"
42 #include "pipe/draw/draw_private.h"
43 #include "pipe/draw/draw_context.h"
44 #include "pipe/cell/common.h"
47 static INLINE
unsigned
48 compute_clipmask(const float *clip
, /*const*/ float plane
[][4], unsigned nr
)
53 /* Do the hardwired planes first:
55 if (-clip
[0] + clip
[3] < 0) mask
|= CLIP_RIGHT_BIT
;
56 if ( clip
[0] + clip
[3] < 0) mask
|= CLIP_LEFT_BIT
;
57 if (-clip
[1] + clip
[3] < 0) mask
|= CLIP_TOP_BIT
;
58 if ( clip
[1] + clip
[3] < 0) mask
|= CLIP_BOTTOM_BIT
;
59 if (-clip
[2] + clip
[3] < 0) mask
|= CLIP_FAR_BIT
;
60 if ( clip
[2] + clip
[3] < 0) mask
|= CLIP_NEAR_BIT
;
62 /* Followed by any remaining ones:
64 for (i
= 6; i
< nr
; i
++) {
65 if (dot4(clip
, plane
[i
]) < 0)
74 * Transform vertices with the current vertex program/shader
75 * Up to four vertices can be shaded at a time.
76 * \param vbuffer the input vertex data
77 * \param elts indexes of four input vertices
78 * \param count number of vertices to shade [1..4]
79 * \param vOut array of pointers to four output vertices
82 run_vertex_program(struct spu_vs_context
*draw
,
83 unsigned elts
[4], unsigned count
,
86 struct spu_exec_machine
*machine
= &draw
->machine
;
89 ALIGN16_DECL(struct spu_exec_vector
, inputs
, PIPE_ATTRIB_MAX
);
90 ALIGN16_DECL(struct spu_exec_vector
, outputs
, PIPE_ATTRIB_MAX
);
91 const float *scale
= draw
->viewport
.scale
;
92 const float *trans
= draw
->viewport
.translate
;
96 machine
->Processor
= TGSI_PROCESSOR_VERTEX
;
98 ASSERT_ALIGN16(draw
->constants
);
99 machine
->Consts
= (float (*)[4]) draw
->constants
;
101 machine
->Inputs
= ALIGN16_ASSIGN(inputs
);
102 machine
->Outputs
= ALIGN16_ASSIGN(outputs
);
104 spu_vertex_fetch( draw
, machine
, elts
, count
);
107 spu_exec_machine_run( machine
);
110 /* store machine results */
111 for (j
= 0; j
< count
; j
++) {
114 unsigned char buffer
[sizeof(struct vertex_header
)
115 + MAX_VERTEX_SIZE
] ALIGN16_ATTRIB
;
116 struct vertex_header
*const tmpOut
=
117 (struct vertex_header
*) buffer
;
118 const unsigned vert_size
= ROUNDUP16(sizeof(struct vertex_header
)
120 * draw
->num_vs_outputs
));
122 mfc_get(tmpOut
, vOut
[j
], vert_size
, TAG_VERTEX_BUFFER
, 0, 0);
123 wait_on_mask(1 << TAG_VERTEX_BUFFER
);
126 /* Handle attr[0] (position) specially:
128 * XXX: Computing the clipmask should be done in the vertex
129 * program as a set of DP4 instructions appended to the
130 * user-provided code.
132 x
= tmpOut
->clip
[0] = machine
->Outputs
[0].xyzw
[0].f
[j
];
133 y
= tmpOut
->clip
[1] = machine
->Outputs
[0].xyzw
[1].f
[j
];
134 z
= tmpOut
->clip
[2] = machine
->Outputs
[0].xyzw
[2].f
[j
];
135 w
= tmpOut
->clip
[3] = machine
->Outputs
[0].xyzw
[3].f
[j
];
137 tmpOut
->clipmask
= compute_clipmask(tmpOut
->clip
, draw
->plane
,
139 tmpOut
->edgeflag
= 1;
147 /* Viewport mapping */
148 tmpOut
->data
[0][0] = x
* scale
[0] + trans
[0];
149 tmpOut
->data
[0][1] = y
* scale
[1] + trans
[1];
150 tmpOut
->data
[0][2] = z
* scale
[2] + trans
[2];
151 tmpOut
->data
[0][3] = w
;
153 /* Remaining attributes are packed into sequential post-transform
154 * vertex attrib slots.
156 for (slot
= 1; slot
< draw
->num_vs_outputs
; slot
++) {
157 tmpOut
->data
[slot
][0] = machine
->Outputs
[slot
].xyzw
[0].f
[j
];
158 tmpOut
->data
[slot
][1] = machine
->Outputs
[slot
].xyzw
[1].f
[j
];
159 tmpOut
->data
[slot
][2] = machine
->Outputs
[slot
].xyzw
[2].f
[j
];
160 tmpOut
->data
[slot
][3] = machine
->Outputs
[slot
].xyzw
[3].f
[j
];
163 mfc_put(tmpOut
, vOut
[j
], vert_size
, TAG_VERTEX_BUFFER
, 0, 0);
164 } /* loop over vertices */
169 spu_bind_vertex_shader(struct spu_vs_context
*draw
,
176 draw
->constants
= (float (*)[4]) uniforms
;
178 (void) memcpy(draw
->plane
, planes
, sizeof(float) * 4 * nr_planes
);
179 draw
->nr_planes
= nr_planes
;
180 draw
->num_vs_outputs
= num_outputs
;
182 /* specify the shader to interpret/execute */
183 spu_exec_machine_init(&draw
->machine
,
191 spu_execute_vertex_shader(struct spu_vs_context
*draw
,
192 const struct cell_command_vs
*vs
)
197 draw
->machine
.Instructions
= (struct tgsi_full_instruction
*)
198 vs
->shader
.instructions
;
199 draw
->machine
.NumInstructions
= vs
->shader
.num_instructions
;
201 draw
->machine
.Declarations
= (struct tgsi_full_declaration
*)
202 vs
->shader
.declarations
;
203 draw
->machine
.NumDeclarations
= vs
->shader
.num_declarations
;
205 spu_bind_vertex_shader(draw
, vs
->shader
.uniforms
,
207 vs
->shader
.num_outputs
);
209 for (i
= 0; i
< vs
->num_elts
; i
+= 4) {
210 const unsigned batch_size
= MIN2(vs
->num_elts
- i
, 4);
212 run_vertex_program(draw
, & vs
->elts
[i
], batch_size
, &vs
->vOut
[i
]);